An　experiment　on　the　performance　of　water　film　removal　from　hollow　stator　blade　surfaces　of　a　steam　turbine　by　slot　suction　was　conducted　on　an　air-water　two-phase　flow　rig　with　an　inlet　air　wetness　of　7%,　a　droplet　diameter　range　of　1.5-201　μm,　a　slot　width　of　1　mm　and　a　slot　angle　of　45°　to　the　blade　surface.　The　investigation　into　the　radial　characteristic　of　the　droplet　deposition　on　the　blade　surface　was　also　performed　with　the　two-phase　flow　numerical　simulation　method　based　on　the　experiment　data.　The　results　show　that　a　maximum　water　removal　rate　was　obtained　at　a　relative　arc　length　of　about　0.5　for　the　suction　slot　on　the　suction　side,　and　for　the　suction　slot　on　the　pressure　side　the　higher　water　removal　efficiency　was　observed　when　the　slot　was　nearer　to　the　blade　trailing　edge.　The　water　removal　efficiency　of　the　blade　surfaces　was　greater　for　the　suction　slot　on　the　pressure　side　than　that　on　the　suction　side.　Increasing　airflow　velocity　resulted　in　the　decrease　of　water　removal　efficiency,　and　larger　suction　pressure　difference　leaded　to　higher　water　removal　efficiency.　In　addition,　the　water　removal　efficiency　exhibited　an　increase　in　the　radial　direction　of　the　blade.